Automatic damper-regulator for furnaces



(No Model.) 4 Sheets-Sheet 1.

O. L. RIDGWAY. AUTOMATIC DAMPER REGULATOR FOR FURNACES, STOVBS, &0.

No. 363,346. Patented May 17, 1887.

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O. L. RIDGWAY. AUTOMATIC DAMPER REGULATOR FOR FURNACES, STOVES, &c.

No. 363,346. Patented May 17,1887.

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. 0.. L. RIDGWAY. AUTOMATIC DAMPER REGULATOR FOR FURNACES, STOVES, 6w.

Patented May 17, 1887.

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4 Sheets-Sheet 4.

(No Model.).

0. L. RIDGWAY. AUTOMATIC DAMPER REGULATOR FOR PURNAGES, STOVES, 6w. No. 363,346.

Patented May 17, I887.

WITNEE-EEE.

UNITED STAT S PATENT OFFICE.

CHARLES L. RIDGWVAY, OF CLINTON, ASSIGNOR TO THE RIDGWVAY FUR- NAOE AND STOVE COMPANY, OF BOSTON, MASSACHUSETTS.

AUTOMATIC DAMPER REGULATOR FOR FURNACES, S TOVES, 80C.

SPECIFICATION forming part of Letters Patent. No. 363,346, dated May 17, 1887.

Application filed April .26, 1886. Serial No. 200,211. (No model.)

To aZZ whom it may concern.-

Be it known that I, CHARLEs L. RTDGWAY, of Clinton, in the county of Worcester and State of Massachusetts, a citizen of the United States, have invented a new and useful Improvement in Automatic Damper-Regulators for Furnaces, Stoves, and other Purposes, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

. Theinvention relates, primarily, to what may be called a double or compound auto matic regulator for operating independent or separate dampers or valves; and it comprises mechanism whereby motion is communicated to the independent or separate dampers from a. single extensible metal tube. It also comprises various details of construction and organization.

Referring to the drawings, Figure 1 is a view in perspective representing portions only of a furnace, showing the principal operative parts of the invention. Fig. 2 isaview representing, in horizontal section, portions of the furnace casing and also showing in plan the two ends of the regulator. Fig. 3 is a vertical central section, portions only of the furnace being shown to further illustrate the construction and operation of the invention.

tion of one end of the regulator, a part of the dial being removed to show the parts which would otherwise be hidden. Fig. 5 is a view in perspective of the other end of the regulator. a part of the disk being broken out or removed to show the parts beyond it.

The invention is represented as applied to a heating-furnace.

A represents the outer casing of the furnace; a, the heating-chamber thereof.

B is the expansible tube of the automatic regulator. 'It extends across the heating-chamber, and is connected at one end with the support or head 0 and its other'end with the support or head 0. The support or head 0 carries mechanism or devices operated by the nonexpansible tube or red D. The support or Fig. 4 is a view in perspective representing the construe shaped stationary arm or block d, which is fastened to the support or head 0, and its opposite end, (P, provides a stationary abutment for the cam or eccentric (1, carried upon the arm d of a rock-lever, (i This rockJever is pivoted at d to an arm or bracket, (2 extending horizontally from the head or support 0, and the end of its arm (I communicates motion to the longer lever, E, which is supported by the arm or bracket (Z in a manner to permit its end 6 to be swung or moved vertically. This lever has theextension or arm e, which bears against the side surface of the arm d of the rock-lever at its end, so that upon a movement 6 of the rock-lever upon its center the end-of the arm (7. is caused to be swung or moved horizontally, and thereby moves the end 6 of the long lever E upward or permits it to fall. The weight of thelong lever and attachments serves to keep the cam in contact with the end of the tube or rod D,and upon the movement of the tube 13, as it expands or contracts, the head or support 0 is of course moved with it, and this causes the rock-lever to be moved to the left when the tube B expands or lengthens and to the right when it contracts or shortens. The lever d is shaped substantially as shown in Figs. 2, 4:, and 6. The short arm (1 projects at a right angle from the lower portion of the 8) long arm d 1 The cam or eccentric is secured to the arm d" of the roek-1ever so as to be turned or re. tated thereon, and this varies the position of the rock-lever in relation to the long lever E and causes its end to be elevated or lowered, according as the cam or eccentric is turned upon the short arm of the rock-lever to move said armfarther away from the end of the rod D or nearer to it. This feature is for the purgc pose of setting the damper or val ve to any do sired position for the operation of the regulator; and the cam has a pointer, F, which will indicate, in connection with the indicatingfigures upon the dial or plate f, which answers 9 5 the purposes of a dial and which is secured to the arm (2, the position of the damper or valve.

The end of the tube D, which operates, in connection with the extensible tube B, the mechanism carried by the head or support 0, abuts against a stationary or rigid arm,

with a slotted arm or extension, 9', and'the end of this slotted arm or extension forms a stationary surface abutment or rest, against which the cam G, secured upon the arm 9 of the rock-lever g bears. This rock-lever is carried or supported at the end of the bracket g, which extends horizontally from the head or support and is secured thereto by a horizontal pivot, g Its long arm 9 is bent or curved downward and inward, as represented in Figs. 3 and 5, and

a long lever, H, which is secured to the arms h, extending from the head 0, by the pin h, bears upon the. upper surface of the end of this arm, so that upon the lengthening or shortening of the tube B motion is communicated to the lever H through the head or support 0, and so that the end of the long arm of the lever is moved upward or downward, according as the tube B shortens or lengthens. Thecam G is in effect a part of the arm of the lever g.

It has a spirally-inclined surface, 9 which bears against the rest or surface and it is adapted to be rotated upon the set-screw which fastens it to the arm 9 of the lever to vary the position of the lever in relation to the said h controlling the cold-air inlet to the direct escape-port. The long lever E is connected by the rod 0 with the arm 0 of the damper or valve 6, which regulates the admission of air to the ash-pit chamber.

It will be seen from this description that two sets of damper or valve-actuating devices are caused to be operated by the elongation and contraction of one extensible tube, and

that by means of the adjustments which are given these sets of actuating devices the time of opening or closing the two dampers or valves may be variedthat is, the devices may be so set or adjusted that one damper shall close upon the opening of the other, or so that both shall open at the same time, or so -that one shall open in advance of the other.

The tubes D D are represented as inclosed within the extensible tube; but it is not necessary that they be in the form of tubes, excepting where one incloses the other, as herein shown.

Having thus fully described my invention, I claim and desire to secure by Letters Patent of the United States- 1. In an automatic regulator for furnaces, stoves, 850., the combination of a tube extensible by heat, the heads or supports 0 0, secured to theends thereof, respectively, the rock-lever d pivoted to an arm or bracket extending from the head 0, and the lever E, operated thereby, the non-extensible rod or tube D, the end of which furnishes a rest or abutment against which one arm of the rock-lever d rests, the non-extensible rod or tube D, the end of which" furnishes an abutment against which the end of one arm of the rock-lever rests, the said rock-lever pivoted to a bracket extending from the head 0, thelever H, operated thereby, and the damper or valve 6 and the damper or valve it, connected, respectively, with the levers E and H, whereby the supply of air to the fire and the escape of gaseous products therefrom are regulated, substantially as described.

2. In an automatic regulator for furnaces, stoves, &c., the combination of a tube extensible by heat, the heads or supports 0 0, secured to the ends thereof, the rock-lever d pivoted to an arm or bracket extending from the head 0, a cam or eccentric, d, at the end of one arm thereof, the non-extensible rod or tube D, the end of which furnishes a rest or abutment against which the said cam or eccentric rests, the lever E, operated by the rocklever (1 the non-extensible-rod or tube D, the end of which furnishes an abutment against which the cam G on one arm of the rock-lever g rests, said cam G, the rock-lever g thelever H, and the damper or valve 6 and the damper or valve It, connected, respectively, with the levers E H, whereby the supply of air to the fire and the escape of gaseous products therefrom are regulated, substantially as described.

3. The combination of a tube extensible by heat, the support or head 0, attached to one end thereof, the stationary non-extensible tube or rod D, and the rock-lever d pivoted to the arm or bracket 01 and having the long arm d and the short arm d, projecting at rightangle from its outer end andnear the lower edge thereof, with the lever E, pivoted at e-to the head and having the foot or arm 0, substantially'as described.

ICO

4.. The combination of a tube extensible by heat, an arm or head, 0, secured thereto, the stationary non-extensible tube or rod D, the rock-lever 9 having the short arm and a longer curvedv arm, 9 a cam or eccentricsecured to the outer arm of the rock-lever, and

the lever H, bearing upon the end of the arm I g", substantially as described.

5. The combination of a tube extensible by heat,' the stationary non-extensible tube or rod, a head secured to the extensible tube, a rock-lever pivoted to abracket or arm extending from said head, a cam or eccentric secured to the short arm of the rock-lever to bear against the end of the non-extensible tube or rod and adapted to I be rotated or turned thereon, an indicator or hand attached to said cam or eccentric, and a dial secured to the bracket or support, substantially as described.

CHARLES L. RIDGWAY. Witnesses.

F. F. RAYMOND, 2d, 'J. M. DOLAN. 

